diff options
Diffstat (limited to 'dom/base/RadioGroupManager.cpp')
| -rw-r--r-- | dom/base/RadioGroupManager.cpp | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/dom/base/RadioGroupManager.cpp b/dom/base/RadioGroupManager.cpp new file mode 100644 index 0000000000..e7c8a730fa --- /dev/null +++ b/dom/base/RadioGroupManager.cpp @@ -0,0 +1,181 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "RadioGroupManager.h" +#include "nsIRadioVisitor.h" +#include "mozilla/dom/HTMLInputElement.h" + +namespace mozilla::dom { + +/** + * A struct that holds all the information about a radio group. + */ +struct nsRadioGroupStruct { + nsRadioGroupStruct() + : mRequiredRadioCount(0), mGroupSuffersFromValueMissing(false) {} + + /** + * A strong pointer to the currently selected radio button. + */ + RefPtr<HTMLInputElement> mSelectedRadioButton; + nsTArray<RefPtr<HTMLInputElement>> mRadioButtons; + uint32_t mRequiredRadioCount; + bool mGroupSuffersFromValueMissing; +}; + +RadioGroupManager::RadioGroupManager() = default; + +void RadioGroupManager::Traverse(RadioGroupManager* tmp, + nsCycleCollectionTraversalCallback& cb) { + for (const auto& entry : tmp->mRadioGroups) { + nsRadioGroupStruct* radioGroup = entry.GetWeak(); + NS_CYCLE_COLLECTION_NOTE_EDGE_NAME( + cb, "mRadioGroups entry->mSelectedRadioButton"); + cb.NoteXPCOMChild(ToSupports(radioGroup->mSelectedRadioButton)); + + uint32_t i, count = radioGroup->mRadioButtons.Length(); + for (i = 0; i < count; ++i) { + NS_CYCLE_COLLECTION_NOTE_EDGE_NAME( + cb, "mRadioGroups entry->mRadioButtons[i]"); + cb.NoteXPCOMChild(ToSupports(radioGroup->mRadioButtons[i])); + } + } +} + +void RadioGroupManager::Unlink(RadioGroupManager* tmp) { + tmp->mRadioGroups.Clear(); +} + +nsresult RadioGroupManager::WalkRadioGroup(const nsAString& aName, + nsIRadioVisitor* aVisitor) { + nsRadioGroupStruct* radioGroup = GetOrCreateRadioGroup(aName); + + for (size_t i = 0; i < radioGroup->mRadioButtons.Length(); i++) { + if (!aVisitor->Visit(radioGroup->mRadioButtons[i])) { + return NS_OK; + } + } + + return NS_OK; +} + +void RadioGroupManager::SetCurrentRadioButton(const nsAString& aName, + HTMLInputElement* aRadio) { + nsRadioGroupStruct* radioGroup = GetOrCreateRadioGroup(aName); + radioGroup->mSelectedRadioButton = aRadio; +} + +HTMLInputElement* RadioGroupManager::GetCurrentRadioButton( + const nsAString& aName) { + return GetOrCreateRadioGroup(aName)->mSelectedRadioButton; +} + +nsresult RadioGroupManager::GetNextRadioButton(const nsAString& aName, + const bool aPrevious, + HTMLInputElement* aFocusedRadio, + HTMLInputElement** aRadioOut) { + *aRadioOut = nullptr; + + nsRadioGroupStruct* radioGroup = GetOrCreateRadioGroup(aName); + + // Return the radio button relative to the focused radio button. + // If no radio is focused, get the radio relative to the selected one. + RefPtr<HTMLInputElement> currentRadio; + if (aFocusedRadio) { + currentRadio = aFocusedRadio; + } else { + currentRadio = radioGroup->mSelectedRadioButton; + if (!currentRadio) { + return NS_ERROR_FAILURE; + } + } + int32_t index = radioGroup->mRadioButtons.IndexOf(currentRadio); + if (index < 0) { + return NS_ERROR_FAILURE; + } + + int32_t numRadios = static_cast<int32_t>(radioGroup->mRadioButtons.Length()); + RefPtr<HTMLInputElement> radio; + do { + if (aPrevious) { + if (--index < 0) { + index = numRadios - 1; + } + } else if (++index >= numRadios) { + index = 0; + } + radio = radioGroup->mRadioButtons[index]; + } while (radio->Disabled() && radio != currentRadio); + + radio.forget(aRadioOut); + return NS_OK; +} + +void RadioGroupManager::AddToRadioGroup(const nsAString& aName, + HTMLInputElement* aRadio) { + nsRadioGroupStruct* radioGroup = GetOrCreateRadioGroup(aName); + radioGroup->mRadioButtons.AppendElement(aRadio); + + if (aRadio->IsRequired()) { + radioGroup->mRequiredRadioCount++; + } +} + +void RadioGroupManager::RemoveFromRadioGroup(const nsAString& aName, + HTMLInputElement* aRadio) { + nsRadioGroupStruct* radioGroup = GetOrCreateRadioGroup(aName); + radioGroup->mRadioButtons.RemoveElement(aRadio); + + if (aRadio->IsRequired()) { + MOZ_ASSERT(radioGroup->mRequiredRadioCount != 0, + "mRequiredRadioCount about to wrap below 0!"); + radioGroup->mRequiredRadioCount--; + } +} + +uint32_t RadioGroupManager::GetRequiredRadioCount( + const nsAString& aName) const { + nsRadioGroupStruct* radioGroup = GetRadioGroup(aName); + return radioGroup ? radioGroup->mRequiredRadioCount : 0; +} + +void RadioGroupManager::RadioRequiredWillChange(const nsAString& aName, + bool aRequiredAdded) { + nsRadioGroupStruct* radioGroup = GetOrCreateRadioGroup(aName); + + if (aRequiredAdded) { + radioGroup->mRequiredRadioCount++; + } else { + MOZ_ASSERT(radioGroup->mRequiredRadioCount != 0, + "mRequiredRadioCount about to wrap below 0!"); + radioGroup->mRequiredRadioCount--; + } +} + +bool RadioGroupManager::GetValueMissingState(const nsAString& aName) const { + nsRadioGroupStruct* radioGroup = GetRadioGroup(aName); + return radioGroup && radioGroup->mGroupSuffersFromValueMissing; +} + +void RadioGroupManager::SetValueMissingState(const nsAString& aName, + bool aValue) { + nsRadioGroupStruct* radioGroup = GetOrCreateRadioGroup(aName); + radioGroup->mGroupSuffersFromValueMissing = aValue; +} + +nsRadioGroupStruct* RadioGroupManager::GetRadioGroup( + const nsAString& aName) const { + nsRadioGroupStruct* radioGroup = nullptr; + mRadioGroups.Get(aName, &radioGroup); + return radioGroup; +} + +nsRadioGroupStruct* RadioGroupManager::GetOrCreateRadioGroup( + const nsAString& aName) { + return mRadioGroups.GetOrInsertNew(aName); +} + +} // namespace mozilla::dom |